Chuck.



Patented June 9, 1914.

L. E. WHITON.

CHUCK.

APPLICATION rum) 83M. 28, 1907.

COLUMBIA PLANOGRAI-n CO-,WASHINGTON I; c

LUCIUS .E. WI-II'I'ON, OF NEW LONDON, CONNECTICUT.

CHUCK.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed September 28, 1907. Serial No. 394,959.

7 '0 alt whom it may concern Be it known that I, LUCIUS E. Win'ron, acitizen of the United States, residing at New London, in the county ofNew London and State of Connecticut, have invented cer-. t ain new anduseful Improvements in Chucks, of which the following is aspecification.

My invention relates to improvements in chucks particularly for holdingWork to be bored.

One of the objects is to secure an effective centering action.

Another object is to hold long pieces of work and center both endssimultaneously,

Another object is to allow for slight irregularities in the stock andyet obtain good centerin These objects are attained by the use ofspecial jaws adjustable in the ordinary manner and having spring like,yielding extensions which are clamped by an adjusting nut or collar.

Figure 1 is a side View of a chuck embodying the invention, parts beingbroken away to expose the means for shifting the jaws simultaneously.Fig. 2, is a fragmentary :t'ace view of the same. Fig. 3, is a detailsectional view of the end of a jaw and the clamping nut.

The invention is particularly directed toward universal jawed chucks ofthe type shown for instance in my former Patent #551, 86, Dec. 17, 1895,and is so illustrated. The body 1 carries a plurality of jaws such as 2,2, 2, which are simultaneously adjust-- able as is common in this typeof chuck for the purpose of gripping the work, such as 3. Each jaw has agripping surface 4 adjacent the chuck body, and an extension with agripping surface 5 remote from the body. The jaw is preferably made froma bar of metal which after the surfaces are finished, is cut throughalong the line 6, so as to leave the extension more or less elastic orflexible. In this way both ends of the jaws can seat properly even ifthe work is slightly irregular. After centering as above described, Iput a further pressure upon the ends of the jaws by means of a nut 7,which is interiorly provided with a tapered screw threadcorrespondingwith the segemental threads on the ends 8, 8, 8 of the jawextensions. In the drawing, the nut is shown as provided with recessesor sockets such as 9, for engagement by a spanner wrench. By turning thenut 7, the ends of the jaws may be tightened or loosened as desired.

In this construction the inner ends of all the aws being of theuniversal type, are simultaneously adjustable, the base of each jawbeing shown provided with teeth 10 meshing with the rotary scroll plate11, whereby all the jaws may be simultaneously moved in or out as thescroll plate is rotated by means of the bevel pinion 12. The outer endsare also simultaneously adjustable, but independently of the inner endssince the outer ends of the jaws are movable inde pendently of the innerends.

What I claim is:

1. In a chuck, a body, a plurality of jaws adj ustably carried therebyhaving gripping surfaces at their inner ends and provided with yieldingextensions having gripping surfaces to engage at a more remote point theobject held by the gripping surfaces at the inner ends of the jaws,means for bodily adjusting the jaws to carry the gripping surfaces atthe inner ends of the jaws into and out of clamping engagement with theobject to be held, and means independent of said adjusting means forsimultaneously adjusting the yielding extensions of the jaws in respectto the object.

2. In a chuck, a body, a plurality of radially movable jaws carriedthereby and having longitudinal extensions, means for adjusting saidjaws simultaneously and means operable independently of said adjustingmeans for clamping all the extensions simultaneously.

3. In a chuck, a body, a plurality of radially movable jaws carriedthereby and having longitudinal extensions, means for ad justing saidjaws simultaneously and a rotatable collar for clamping all theextensions simultaneously and independently of said adjusting means.

1. In a chuck, a body, three cooperating jaws carried thereby spaceduniformly and radially adjustable on said body, each of said jaws havinga gripping surface at its inner end and an extension provided with agrippingsurface remote from the first gripping surface of the jaw, meansfor simultaneously adjusting the three jaws inwardly to thereby centerthe work in the chuck, and means independent of said adjusting means forsimultaneously clamping. the extensions upon the Work so centered by thejaws.

5. As an article of manufacture, a lathe chuclnjaw formed of an integralpiece of metal and comprising a base portion 2 adapted to be adjusted inthe body of a chuck and having a grippingface 4 and an extension havinga gripping face 5, said jaw having a slot 6 separating the base portionfrom a part of "the extension, the extension being connected tothebaseportion atpthe outer edge whereby the extension has a limited: yieldingmovement relative to the base portion.

In testimony whereof I aflix my signature in presence of two Witnesses,

LUCIUS E. H1T0N Witnesses L. G. STEBBINs, J. H. GUMBLE.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

